Abstract: A digital circuit arrangement for directly converting compressed DM or DPCM signals into PCM signals, comprising a digital filter and a step size control circuit in which a DM bit or a DPCM code word and the associated step size code word are simultaneously applied to the digital filter.

Abstract: For each IC and adapted circuit is accommodated on the same semiconductor substrate in order to define a specific initial state of the circuit groups, which generally consist of flip-flops. The use of the invention ensures a high constancy over a wide temperature range. Moreover, the spread in the tolerances of the circuit elements is substantially eliminated.

Abstract: Recursive digital filter comprising at least two digital delay devices, a multiplying device having two inputs which are coupled to one another in a common branch point, a summing device from which a sum signal is derived the magnitude of which is at least equal to the sum of the output signal of the multiplying device, and a feedback circuit connected between the output of the summing device and the distribution point. The feedback circuit is provided with a discarding device which acts on numbers given in sign-and-magnitude representation and which by means of magnitude truncation restricts the number of bits of the numbers applied to the branch point.

Abstract: The store of a computer configuration comprises a number of signalling bit locations. These locations are assigned to a peripheral apparatus or to a program stored in a store segment and indicate whether the peripheral apparatus or the program is accessible. For the modification of a signalling bit, a claim cycle is required which consists of successive read, modification, and write phases. In order to reduce the waiting time for other users during claims cycles, such cycles are always sub-divided into two parts, and if a claim cycle is being performed, this is indicated by the state of a claim flipflop. Further claim cycles are then blocked, but normal storage cycles remain permissible.

Abstract: A method of manufacturing colored pressed glass articles by indiffusion of ions under reducing conditions, in which method before the indiffusion a layer having a thickness of at least 10 .mu.m is removed by etching with HF.

Abstract: A non-recursive interpolating digital filter for generating, output code works, at an arbitrary rational ratio between the input and output sampling frequencies. The input code words are entered and stored in a buffer, and entered into a storage device at predetermined times determined by a controlled pulse generator.

Abstract: A frequency divider for high frequencies including a first and a second bistable circuit, each of which include two cross-coupled transistors, in which the common emitter circuits of the transistors of the two bistable circuits are each connected through a current source to a point of constant potential. The collectors of the transistors of the first circuit are each connected to a respective collector of each of the transistors of the second bistable circuit, and a coupling resistor is included between the collector and the base of each of the auxiliary transistors.

Abstract: Method of producing a glass which is transmissive to ultraviolet radiation, comprising the steps of:Providing a glass batch mixture consisting of, in per cent by weight:______________________________________ SiO.sub.2 61 - 70 CaO 0 - 6 B.sub.2 O.sub.3 0.5 - 3.5 BaO 4 - 15 Na.sub.2 O 8 - 10 MgO 0 - 5 K.sub.2 O 9 - 12 Al.sub.2 O.sub.3 1 - 5 ______________________________________together with iron impurities;Melting said glass batch mixture; andAdding to said mixture a refining agent which consists of a sulfate to which an organic reducing agent selected from the group consisting of sugar, carbon, sawdust, and charcoal has been added for maintaining the iron impurities in divalent form, and reducing the number of gas occlusions, the resulting seed-free glass having a tranmissivity of 65% per mm thickness to radiation in the range around 253.7nm.

Abstract: A hand-held scanning device is moved across a line of print and generates a two-dimensional scan of the print. A line array of photodiodes performs the scan in one direction and the movement across the paper generates strobe pulses each of which allows one scan of the array to be passed to a store from which a domestic T.V. set can be fed to provide an enlarged display. It may be used as a reading aid for partially sighted people or as an input device for an OCR machine.In the case of a reading aid using a T.V.-type raster display, the store is organized to allow new array scans to be written in at a variable rate dependent on hand motion while the contents of the store are read out repetitively and non-destructively at a constant line-by-line rate suitable for the T.V. raster.

Abstract: A film circuit which realizes a time constant the equivalent of a large RC time constant without the use of capacitors of comparatively large dimensions. The circuit includes a differential amplifier, to the first input of which an input signal is applied and at the second input of which an output signal is produced, in such a way that said output signal follows the d.c. level of the input signal, while rapid fluctuations of the input signal are not followed. The output signal is taken from a voltage divider which is included between the supply terminals and which comprises at least one temperature sensitive element which is in direct thermal contact with a heating resistance layer which is included in at least one of the outputs of the differential amplifier.

Abstract: A capacitor which has been given a predetermined capacitance by sand-blasting, in which an additional metal layer of higher conductivity is galvanically deposited over the electrodes, over the junctions of the supply wire and the electrode, and over a portion of the supply wire.

Abstract: A burst transmission remote control system in which the information about the functions of N transmission channels are indicated by (N + 1) intervals between (N + 2) narrow pulses which are transmitted in repeated bursts, the duration of the intervals having two values defined by the presence or absence of information. The system includes a transmitter having cascaded trigger circuits, and a receiver having a binary/decimal decoder circuit.

Abstract: An interpolating non-recursive digital filter in which the circulating storage device which has a periodically changing storage time, is controlled by a clock-pulse generator, and has an output circuit whereby within one input sampling period the input code words stored in the storage device are supplied a predetermined number of times to the multiplying device.

Abstract: A digital filter is described in which the filter coefficients which differ from zero are coded in unequal numbers of multipliers which are equal to 2.sup.n and in which immediately after each multiplication of a given signal sample by the multipliers of the relevant filter coefficent a new signal sample is processed in the multiplying devices by the relevant multipliers. Thus the signal samples are applied to the multiplying device at instants which are mutually set independently of one another.

Abstract: A storage configuration comprising a main store, a buffer store having a smaller storage capacity, and an associated address store, comprising an address generator in which successive addresses can be generated for identification of the words of the buffer store. Also provided are means whereby the successive addresses can be taken up in the address locations of the address store, with the result that the buffer store can be addressed as a store having successive addresses by way of the address store.

Abstract: A method is obtained for generating pseudo-random bit sequence words which is characterized in that the bit contents of a given number of elements of the main register are used as an address for reading out from a memory of a corresponding superposition bit sequence of a length equal to the length of the main register and the bit sequence of a number of given elements of the main register are selected as a first word of the series.

Abstract: Memory system comprising a first memory and a second memory, in which memories a plurality of memory elements are arranged according to word locations and can be addressed by an address signal per word location, further comprising for each memory an instruction line for read and/or write instruction signals, driving devices and terminals in each memory which are interconnected by a data path line, and a control device capable of generating the instruction signals for addressing word location in the first memory for transferring information associated therewith as an information word via the data path line between the two memories.

Abstract: A computer system comprising a storage configuration, including a main store, a buffer store of smaller capacity, and an associated address store. Means are provided so that when a byte or word of a word block is to be written in the main store from a processor or another portion of the system, the buffer store cooperates in the transfer operation, provided the relevant word block is present in the buffer store.

Abstract: An apparatus for producing a predetermined transfer characteristic of information-containing signals, comprising clock means for generating a clock pulse, input means for supplying digital representations of said information-containing signals; coefficient generator means for supplying a first train of pulses of digital multiplication coefficients; delay means; digital multiplier means; and a storage device including an alternator provided with a sign reversing device and a summation device.

Abstract: A read-only memory which can be programmed by means of internal fuses and whose memory cells are formed by bipolar transistors in an ECL circuit.The emitters of the memory-position transistors are coupled to the emitter in a row-address transistor, the bases are connected directly to the emitter of a column read transistor, the collector lines include the fuses, and the rows and columns are supplied from current sources.